Oil filter



Jan. 29, 1946. w. L. CLAY OIL FILTER Filed'oct. 24, 1941 2 Shee ts-Sheet 1 INVENTOR. WHIL HTI'LLHEJE BY M ATTORNEYS.

W. L. CLAY Jan. 29, 1946.

OIL FILTER Filed Oct. 24, 1941 2 Sheets-Sheet 2 FIG. 4.

6/ INVENTOR. William. L. Ill 51 BY g 2 M ATTORNEYS.

lull! ////////l Patented Jan. 29, 1946 UNITED STATES PATENT OFFICE on. m'rna wimam Clay, Oklahoma City, om. Application October 24, 1941. Serial No. 416,414

2 Claims.

This invention relates to improvements in oil filters.

The primary object of this invention is the provision of a lubricating oil filter primarily of this specification, and wherein similar reference characters designate corresponding parts throughout the several views,

Figure 1 is a side elevation of the improved oil filter showing its line connections.

Figure 2 is a side elevation of the removable cartridge and its attached portions.

Figure 3 is a horizontal cross sectional view taken substantially on the line 3-3 of Figure 4.

Figure 4 is a vertical sectional view taken through the improved oil filter substantially on the line 4-4 of Figure 1.

In the drawings, wherein for the purpose of illustration is shown only a preferred embodiment of the invention, the letter A may generally designate the improved oil filter, which preferably includes a casing B; filter cartridge C and means D mounting the filter cartridge in place.

The casing B preferably comprises a cylindrical body portion havinga bottom wall I l. The latter is centrally provided with upstanding step seat 12 forming a socket adapted to receive the lower end of a clean oil discharge line l5, forming part of the means D, and which will be subsequently described. The bottom wall II is provided with a suitable drain opening I which may be closed by a plug or pet cock IQ of any approved construction.

The cylindrical body In is open atits top and provided with an outwardly extending flange 20 to which the top wall 2| of the casing is attached, as by bolt means 22. This top wall 2| forms part of the means D which mounts the cartridge C in position.

At its lower end the cylindrical shaped body I0 is provided with dirty oil intake ports 23, in diametrically opposed relation; formed by attachi0, as by welding. Similarly, adjacent its upper end the body I0 is provided with dirty oil outlet ports, in diametrically opposed relation. These ports 24 are also formed by attaching suitable bosses to the casing III, as can be seen in Figure 4.

The filter cartridge 0 preferably comprises a cylindrical shaped perforate bag of woven ducking and receives therein a concentrated filter earth composition, designated at 30, preferably fuller's earth.

The mode of assembling the cartridge C and of shaping the same is to provide a disc shaped baiile and base plate 40, either integral or welded upon the clean oil line II; a stub portion of the clean oil line I! projecting below the plane of the baiiie l0 and adapted to seat in the socket provided by the step seat i2, as is shown in Figure 4. The disc 40 really rests upon the top edge of the step seat l2 and locates the base or battle 40 in spaced relation above the bottom II. The disc 40 terminates at its marginal edge short of the interior surface of the cylinder l0, preferably half an inch, -to permit circulation of the oil to be filtered. The earth is packed in cylindrical 26 formation in the duck bag and mounted on the 'baflie-base 40 soas to be circumferentially spaced from the internal surface of the cylinder I0 about half an inch; the space being designated at 42 in Figure 4 of the drawings. The top of the duck bag is necked, as at 43, and secured by a suitable band 44 upon the upper end of the clean oil line l5.

The clean 011 line I5 projects above the cartridge C and is externally screw threaded at I. This screw threaded end is detachably connected in the internal threaded depending sleeve portion 48 centrally provided upon the top wall 2| of the casing. A lock nut 50 is threaded upon the screw threaded upper end of line I! and locks against the lower edge of the sleeve or boss 48 to definitely lock the. pipe I! and the cartridge 0 therewith upon the top wall 2 I forming the casing. It is thus readily observable that the cartridge can be removed and replaced with respect to the casing B, by reason of its attachment to the detachable top wall 2| of the casing.

About midway between its ends, the clean oil line I! is provided with a series of port openings adapted to receive the oil after it is filtered through the material C. The pipe line is provided with three or more layers of heavy filter felt; the same being wound circumferentially about the line I! and secured by suitable bands 62 above and below the ports 80.

ing suitable bosses upon the interior of the casing 5 In order to prevent channeling or creeping of the oil vertically along the pipe II I prei'er to provide annular flanges I and 08 forming bafiies above and below the filtering felt I, in the relation shown in Figure 4, of the drawings.

It is to be noted that the spaces between the than the space surrounding the cartridge C. This enables a very emcient circulation of dirty oil for jfilterlng purposes.

I provide a sleeve extension on the top wall 2|, at the upper surface thereof; contiguous with the extension 4| depending into the casing. It is internally screw threaded and adapted to detachably receive a bushing I l The latter is internally screw threaded and adapted to receive the clean oil outlet line I! leading to the engine.

The intake oil line 80 from the crank case is cmnected by means of a yoke 8| to the two ports 28. Similarly, the return line 85 to the crank case, through which excess dirty oil which cannot be filtered is returned to the crank case. is connected by a yoke 88 to the two outlet ports 24. a In this line connection II there is positioned a pressure regulating valve I! for the purpose of holding the pressure in the filter to approximately thirty pounds, in order to facilitate filtering of the oil by forcing it'through the earth concentrate and into the passageway of the line it, where the pressure is lower.

The top wall 2! of the casing is preferably provided with carrying handles ll.

'I'hetopwallll ofthecasingalsohasapressur gauge 05.

Various changes in the shape, size, and arrangement of parts may be made to the form of inventlon herein shown and described, without departing from the spirit of the invention and the scope of the claims.

, Iclaim:

l 1. An oil filter comprising a rigid cylindrical casing,-including side, top and bottom walls, said side walls formed at their upper end with an outwardly projecting annular flange, said top wall removably enga ing said flange. means attaching I through said top wall and said flange for securpair of diametrically opposed inlet openings spaced upwardly from said bottom wall and a pair of diametrically opposed dirty oil outlet openings spaced downwardly from said upper wall, a tube depending from said upper wall and threadably engaged therewith through said downwardly extending boss, said tube removably engaging said upwardly extending boss on said bottom wall, said tube formed with a wide annular flange near the lower end thereof, said flange spaced slightly inwardly from said side walls and adapted to engage the upwardly extending boss of said lower wall, a plurality of small annular flanges intermediate the length of said tube, said tube formed with openings between said smaller flanges and a closely woven fabric pad detachably secured to said tube and covering said openings, a fabric casing surrounding said tube, filtering material enclosed within said fabric casing. said fabric casing supported at its lower end by said wide flange,

the sides of said casing being spaced from the side walls and perpendicular to the periphery of said wide flange. said fabric casing extending upwardly from said wide flange and encompassing said smaller flanges and said fabric pad and closing around said tube forming an upper surface spaced below said upper wall.

2. An oil filter as set forth in claim 1 including tubes connecting said diametrically opposed upper openings of said side wall and a pressure regulating valve connected between said latter tubes.

WILLIAM L. CLAY. 

